Question

What is the rarest metal in the world​

Answer 1

Rhodium

Facts About Rhodium. Rhodium is a silver-white metallic element that is highly reflective and resistant to corrosion. It is considered the rarest and most valuable precious metal in the world — well above gold or silver.

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Answer 2

Answer:

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Two of the world's rarest metals are rhodium, which is estimated to be three parts per billion in the universe, and osmium, which is estimated to be about 0.6 parts per billion in the universe. By comparison, aluminum and iron make up 8.1 percent and 5 percent of the Earth's crust, respectively. Other natural metals are much rarer than rhodium and osmium because they are unstable, meaning they don't have a single stable, naturally occurring isotope. For example, less than 1 ounce of francium exists in the world at any given time. This is because it doesn’t last long. Its half-life is 22 minutes. After 22 minutes, half of it decays to another element, such as astatine or radium.

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